An educational intervention in estimation for in-service teachers
					
				Abstract
In recent decades, several studies have been conducted on the field of teaching mathematics related to the subject of estimation. However, few relate to teaching interventions and even to educational interventions for teachers. Current research aims to study and compare the factors that determine the change in the performance of 11 in-service Greek primary school teachers, following an educational intervention in estimation. The factors focused on this survey, in order to measure the change of teacher performance, related both to their cognitive and to their personal characteristics. The first category consisted of: the ability to formulate the definition of estimation, content knowledge (CK), pedagogical content knowledge (PCK) based on questionnaire findings, PCK based on observation of the teaching process, estimation strategy use, and student performance in estimation problems. The second category consisted of: age, orientation towards mathematics (based on studies in high school), ...
								
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